Sökning: "divergence time"

Visar resultat 1 - 5 av 144 avhandlingar innehållade orden divergence time.

  1. 1. Adaptive divergence in fission yeast : From experimental evolution to evolutionary genomics

    Författare :Sergio Ivan Tusso Gomez; Jochen B.W. Wolf; Simone Immler; Roger K. Butlin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adaptation; divergence; selection; experimental evolution; genomics; genome evolution; population genetics; fission yeast; phenotypic variation; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Sammanfattning : How adaptation and population differentiation occur is fundamental to understand the origin of biodiversity. Work in speciation alongside the increased ease of generating genomic data have allowed the exploration of genomic changes relevant to adaptation. LÄS MER

  3. 2. Dating Divergence Times in Phylogenies

    Författare :Cajsa Lisa Anderson; Kåre Bremer; Katleen M. Pryer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; systematic biology; divergence time; nonprametric rate smoothing; Bayesian; multidivtime; eudicots; Neoaves; monocots; dating; molecular clock; relaxed clock; age constraint; fossil; calibration; PATHd8; penalized likelihood; Biology; Biologi;

    Sammanfattning : This thesis concerns different aspects of dating divergence times in phylogenetic trees, using molecular data and multiple fossil age constraints.Datings of phylogenetically basal eudicots, monocots and modern birds (Neoaves) are presented. Large phylograms and multiple fossil constraints were used in all these studies. LÄS MER

  4. 3. Displaced Literature : Images of Time and Space in Latvian Novels Depicting the First Years of the Latvian Postwar Exile

    Författare :Juris Rozītis; Prof. Baiba Kangere; Prof. Vieda Skultans; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Bakhtin; chronotope; Displaced Person; émigré; exile; immigrant literature; Latvia; Latvian literature; Latvian history; life-story; narrative; novel; postwar Germany; refugee; setting; space; time; time-space; UNRRA; WWII; Literature; Litteraturvetenskap;

    Sammanfattning : In the years immediately following the Second World War, the main part of Latvian literature was produced by writers living outside Latvia. To this day Latvian literature continues to be written outside Latvia, albeit to a much smaller extent. LÄS MER

  5. 4. Divergence, admixture and continuity in the human past : Demographic inference using ancient and modern genomes

    Författare :James McKenna; Mattias Jakobsson; Per Sjödin; Ida Moltke; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Human evolution; population genetics; ancient genomes; population continuity; divergence; Biology with Specialisation in Human Evolution and Genetics; Biologi med inriktning mot människans evolution och genetik;

    Sammanfattning : Demographic forces shaping the genetic variation we observe today can include population divergences, admixture events and continuity through time. The advancement of high-throughput sequencing technologies, together with developments in molecular and bio-informatics methods, mean the number of ancient genomes available for inference has risen steeply. LÄS MER

  7. 5. On Estimating Topology and Divergence Times in Phylogenetics

    Författare :Bodil Svennblad; Allan Gut; Tom Britton; Thore Egeland; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical statistics; Phylogenetics; Divergence Time; Likelihood based methods; Non-informative prior; bootstrap support; Matematisk statistik;

    Sammanfattning : This PhD thesis consists of an introduction and five papers, dealing with statistical methods in phylogenetics.A phylogenetic tree describes the evolutionary relationships among species assuming that they share a common ancestor and that evolution takes place in a tree like manner. LÄS MER